30401221 has 2 divisors, whose sum is σ = 30401222. Its totient is φ = 30401220.

The previous prime is 30401209. The next prime is 30401227. The reversal of 30401221 is 12210403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 261121 = 5490^2 + 511^2 .

It is a cyclic number.

It is not a de Polignac number, because 30401221 - 2⁷ = 30401093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30401227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15200610 + 15200611.

It is an arithmetic number, because the mean of its divisors is an integer number (15200611).

Almost surely, 2^30401221 is an apocalyptic number.

It is an amenable number.

30401221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30401221 is an equidigital number, since it uses as much as digits as its factorization.

30401221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30401221 is about 5513.7302255370. The cubic root of 30401221 is about 312.1023285049.

Adding to 30401221 its reverse (12210403), we get a palindrome (42611624).

The spelling of 30401221 in words is "thirty million, four hundred one thousand, two hundred twenty-one".